The closure is needed for a California Highway Patrol traffic investigation.

Motorists traveling on eastbound I-8 will be detoured onto Old Highway 80/Alpine Boulevard at Dunbar Lane/Harbison Canyon Road and back onto I-8 at Tavern Road.

For timely information about closures and incidents on state highways in San Diego and Imperial counties follow SDCaltrans on Twitter at http://www.twitter.com/SDCaltrans -- tweets Monday - Friday, 8a.m. to 5p.m.